Boiler.



No. 871,691. PATENTBD NOV. 19, 1907.

M. T. GOSS.

-BOILER. APPLIOATIONHLBD JULY-1s. 1.905. q W a sH- BnTs-SHEBT 2. @T F? OOOOOOOO w`\\\ OOOOOOOOOOO 2 OOOOOOOOOOOOOOOOO OOOOOOOO OOOOOOOO OOO OOO 7 OOO OOO WJTNESSES.- jf'lfd 17 [506' 5, INI/ENTOR.

A TTORNE Ys ssssssssssssssssssssssssssssssss c.

- No. 871,691. Y PATENTED NOV. 19, 1907.

'A TTORNE )f5 MILFORD GOSS, OF CHICAGO, ILLINOIS.

B OILER.

Specification of Letters Patent.

Patented Nov. 19, 1907'.

Application filed July 18. 1906. Serial No. 326.785.

To all whom it may concern:

Be it known that I, MILFORD T. Goss, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Boiler, of which the following is a specilication.

This invention relates to steam boilers, and has for one of its objects to provide a quick steaming boiler in which the heat of the products of combustion may be utilized to the fullest extent.

A further object of the invention is to provide a water tube boiler in which the water tubes are of smaller diameter than usual and laced so closely together as to prevent the iree passage of the products of combustion, so that the water within the tubes may absorb the'heat.

A still further object of the invention is to provide a water tube boiler in which a centrally arranged tube of relatively large diameter is employed as a column to brace the tube sheets and prevent the bulging of the sheets due to the pressure within the end drums.

A still further object of the invention is to provide a novel form of water tube boiler that is thoroughly braced throughout, and in Which the baffle plates are so arranged as to maintain the heated gases of combustion in contact with the tubes and drums for a comparatively long period of time.

With these and other objects in view, as will more fully hereinafter appear, the invention consists in certain novel features of construction and arrangement of parts, hereinafter fully described, illustrated in the accompanying drawings, and particu-k larly pointed out in the appended claims, it being understood that various changes in the form, proportions, size and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings :--Figure 1 is a sectional elevation of a steam boiler constructed in accordance with the invention. Fig. 2 isa transverse sectional elevation of the same on the line 2 2 of Fig. 1. Fig. 3 is a detail sectional view of a portion of the boiler, drawn'to an enlarged scale. Fig. 4 is a perspective view of one of the braces. Fig. 5 is a sectional view, on an enlarged scale, of one of the brace connections.

Similar numerals of reference are employed to indicate corresponding parts throughout the several iigures of the drawings.

The boiler forming the subj ect of the present invention is of the water tube type, and is provided with front and rear drums 1() and 11 that are connected by inclined Water tubes 12 and 13, these being arranged in two sets, disposed one above the other, and separated by an inclined baille plate 14 which extends from the rear drum 11 to a point adjacent to the front drum, in order that the products of combustion may be iirst directed into engagement with the lower tubes 13, and then forced to travel to the rear in contact with the upper tubes 12.

The majority of the tubes are two inches in diameter, and are placed closely together in order to prevent the free passage of the products of combustion, while a number of thetubes, especially those in the lower portion of the lower bank 13, are three inches in diameter, and are also placed closely together for a similar purpose, the larger tubes being employed in the lower bank in order to prevent the possibility of displacement of water by steam and burning tubes, when the temperature of the furnace is very high, which might be experienced if all two inch tubes were used.

In order to reinforce the tube sheets, a largeV tube 16 is connected to the central portions of the sheets, the latter being provided with langed openings, and said tube serves as a column which prevents bulging of the sheets due to the heavy pressure within the end drums. The structure is', also, reinforced and strengthened by a tension rod 17 which extendsthrough the large tube 16 and connects the convex heads of the drums, the rod extending through suitable openings formed at the centers of the heads and being provided with nuts 1S that bear against the outer surfaces of said heads. As a further precaution, a number of stays or braces 19 are arranged between the tube sheets and the convex heads, these braces being coupled to blocks 20 bylinch pins 2], and the blocks being provided with reduced threaded portions that are adapted to threaded openings formed in the flue sheets and heads, it being unnecessary to employ nuts on the threaded portions of the blocks in order to retain the same in position. Should there be any leakage around the threaded portions of the blocks, the latter may be backed out, and packing of any suitable nature introduced between the ends of the blocks and the adj an cent faces of the tube sheets or heads.

The upper steam drum 22 is connected" to the end drums by cylindrical tubes 23, and. these are preferably bricked in to form the,

front and rear walls of the furnace proper.

Arranged below the forward portion ofthe boiler is the usual grate 26 and bridge wall' 27, and above these and extending rearward of the bridge wall is an arch28by whichthe products of combustion maybe first directed" Immediately below the steam drum. 22 .is a` forwardly extending b affle 3 lith at-.terminates short of the front wall, so that the products of combustion will bev compelled to pass around the steam drum before finally escaping, so that the drum may be utilized as a superheater.

In practice, the upper bank and a part of the lower bank of tubes are made two inches in diameter and are spacedithree inches from center to center, while the larger lower tubes are three inches in diameter and spaced four inches from center to center. In some cases, however, both banksmay be formed wholly of two inch or `of three inch tubes.

I claim z- In a steam boiler, a furnace, end ldrums supported by the furnace walls, upper and lower baffles extending rearward from below the bottom and above the top of the forward drum, the inner heads of the drums forming tube sheets, said tube sheets beingproyided withy centrally disposed openings having flanged walls, a water tube of large diameter disposed centrally of the boiler `and riveted to the anges, saidtube serving to reinforce the tubesheets andv to connectv the'drums, bafile plates built inwardfrorn the opposite sides of the'furnace walls-intocontact with the sides ofsaidl water tube, braces connect:- ing the tube sheets to the outer heads of the drums, avpair of banks of waterl tubes connecting the end drums. and spaced from each other' by the centralab aifle plate, the tubesof the upper bank being of smaller diameter than those ofthe lower bank, and a bolt extendingthrough the large watertube and connected to theouter heads of the drums, substantially as specified.

In testimony that I claim the foregoing as my own, Ifhaveheretoaflixedmy signature in the presence of two witnesses.

MILFGRD T. GOSS l Witnesses c ANNA M. ITEN, ANNA RIDGEWAY. 

